gas master

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Gasmaster

Control panel for gas and fire monitoring



Gasmaster is the flexible and simple-to-use solution wherever you need a self-contained control panel to monitor

gas or fire hazards.

It combines extensive features and outstanding performance to suit all applications. Gasmaster provides the

information you need at a glance via the comprehensive display, and all adjustments can be performed using the

buttons on the front panel. Gasmaster can operate ‘stand-alone’ or interface with any alarm devices and control

systems using a selection of outputs.

In short, Gasmaster is the flexible control panel you can trust.

Simple and convenientGasmaster has been designed for easy operation. All

gas levels are displayed simultaneously to enable full

system status checks at a glance.

All functions from day-to-day operation to re-calibration

can be carried out from the front panel, so routine

testing can be performed in a moment.

Gasmaster PC software enables re-configuration and

event log upload in an instant.

Installation and maintenance is also extremely

simple. Ample space is provided for cable glands andtermination of wiring. Gasmaster warns when calibration

is due, and all inputs and outputs can be quickly tested

using a simple button press.

Safe and reliable

There are two levels of alarm per channel as well as

common alarm and fault relays, which can be configured

to suit site requirements. An integral 85dB multi-tone

sounder is fitted as standard.

Relays can operate in ‘fail-safe’ mode, and all coils are

actively monitored so Gasmaster can warn if a relay

fails.

Battery back-up is provided as standard to ensure

continued protection even if the power fails.

Alarms and faults are recorded in an ‘event log’ which

can be accessed regularly to assess risks on site.

Flexible input and

output options

Gasmaster can monitor and control virtually any

combination of gas or fire detectors, and offers an array

of outputs as standard to enable simple integration with

any control equipment with minimum wiring.

Gasmaster provides relays, drives for audible/visual

alarms, 4-20mA or 1-5V outputs and RS-485 Modbus

communications for comprehensive monitoring and

control.

For convenience, Gasmaster has a remote inhibit and

remote reset facility to enable control from any point on

your site.

Level 1 alarms can be set to operate ‘silently’ so that

ventilation fans can be controlled without raising alarms.

Adaptable to your

needsThe LCD display can be set to read in many languages,

and provides detailed descriptions of alarms and

detector locations as well as system status.

Gasmaster is available in two versions to address the

needs of virtually any application:

Gasmaster 1: for one gas detector, fire zone or

Environmental Sampling Unit (contact Crowcon for

details)

Gasmaster 4: for one to four gas detectors, fire zonesor Environmental Sampling Units (contact Crowcon for

details)

Gasmaster



Gasmaster 4

Gasmaster Accessories

AC/DC power options

plus internal battery

back-up.

4-20mA or

1-5V outputs per

channel

Relays for low and high alarm

for each channel, plus common

alarm and fault

RS-485 Modbus

communicationsEvent logging1

Alpha-numeric

scrolling display

which shows

comprehensive

system information

Large clear display

which shows

all gas levels

simultaneously

Ultra-bright alarm

indicator bar

System status

LED’s

Switches for all

system operation

and maintenance

functions

Industry-standard

gas detectors

Auxilliary Power Unit provides extended

back-up in the event of mains power

failure.

Accessory Enclosure allows connection of

mV Bridge type flammable gas detectors.

Remote inhibit

and reset switches

Dedicated audible/

visual alarm drives

Up to 20 fire/heat

detectors per zone

Sampling

Device control

for Crowcon’s

EnvironmentalSampling Unit

1 Event log access requires optional Communications Kit



Gasmaster 1 Gasmaster 4

Size 288h x 278w x 110d (mm) 288h x 278w x 110d (mm)

Weight 4.5Kg 4.5Kg

Enclosure material Back-box: cast aluminium Back-box: cast aluminium

Front cover: fire-retardant ABS plastic Front cover: fire-retardant ABS plastic

Ingress protection IP54, IP66 optional IP54, IP66 optional

Power 100-240Vac 50-60Hz or 100-240Vac 50-60Hz or

20-30Vdc, 60W max. 20-30Vdc, 60W max

Battery back-up 1.2Ah batteries fitted internally 1.2Ah batteries fitted internally

Operating temperature -10oC to +50oC (14 to 122oF) -10oC to +50oC (14 to 122oF)

Humidity 0 to 95% RH non-condensing 0 to 95% RH non-condensing

Inputs: Gas One 2 or 3 wire 4-20mA gas detector (sink or One to four 2 or 3 wire 4-20mA gas detectors

source). Adaptor for mV bridge type detectors (sink or source). Adaptor for mV bridge type

available. detectors available.

Fire One loop of up to 20 conventional smoke/heat One to four loops of up to 20 conventional

detectors or manual call points, or one flame smoke/heat detectors or manual call points, or one to

detector (4-20mA or digital contact signal) four flame detectors (4-20mA or digital contact signal)

Environmental Sampling Unit For use with one Crowcon ESU For use with one to four Crowcon

sampling device ESU sampling devices

Remote inhibit Via normally open contact Via normally open contact

Remote reset Via normally open contact Via normally open contact

Outputs: Relays DPCO contacts rated Low alarm. High alarm. Fault. Alarm relays can be Low alarm and High alarm per channel plus

250Vac 8A (non-inductive load). set for rising or falling alarms. Hysteresis can be Common Low, High and Fault. Alarm relays can be

Relays can be set as energised or adjusted on low alarms set for rising or falling alarms. Hysteresis can be

de-energised, latching or adjusted on low alarms

non-latching, latching acceptable

Audible/visual 24Vdc 650mA max. drive 24Vdc 650mA max. drive

alarm drive (typically 2 devices max.) (typically 2 devices max.)

Analogue 4-20mA (current source, max. loop resistance 700Ω) 4-20mA for each channel (current source, max.

or 1-5Vdc (min. load 50 KΩ) loop resistance 700Ω) or 1-5Vdc (min. load 50 KΩ)

Digital communications RS-485 Modbus RTU for monitoring and control via RS-485 Modbus RTU for monitoring and control via

DCS/SCADA/PLC systems DCS/SCADA/PLC systems.

Communications port1 For PC configuration and event log upload For PC configuration and event log upload

Event logging1 Time-stamped log of up to 300 alarm, fault or system Time-stamped log of up to 300 alarm, fault or system

intervention activities intervention activities

Panel indication LCD back-lit display shows gas level LCD back-lit display shows gas level

(in ppb, ppm, % volume or % lel units), (in ppb, ppm, % volume or % lel units)

and scrolling alpha-numeric status indication. for all channels, and scrolling alpha-numeric status

LED’s for Alarm, Fault, Power and Warning. indication.

Integral 85dB sounder LED’s for Alarm, Fault, Power and Warning.

Integral 85dB sounder

Approvals EN 50270 (EMC) EN 50270 (EMC)

EN 61010-1 (Low voltage directive) EN 61010-1 (Low voltage directive)

P05007 Issue 5 02/07UK OfficeCrowcon Detection Instruments Ltd2 Blacklands Way

Abingdon Business Park AbingdonOxfordshire OX14 1DYUnited KingdomTel: +44 (0) 1235 557700Fax: +44 (0) 1235 557749Email: [email protected] Site: www.crowcon.com

USA OfficeCrowcon Detection Instruments Ltd21 Kenton Lands RoadErlanger Kentucky 41018-1845USATel: +1 859 957 1039 or

1-800-5-CROWCONFax: +1 859 957 1044Email: [email protected] Site: www.crowcon.com

Rotterdam OfficeCrowcon Detection Instruments LtdVlambloem 1293068JG, RotterdamNetherlandsTel: +31 10 421 1232Fax: +31 10 421 0542Email: [email protected] Site: www.crowcon.com

Singapore OfficeCrowcon Detection Instruments LtdBlock 194 Pandan Loop#06-20 Pantech Industrial ComplexSingapore 128383Tel: +65 6745 2936Fax: +65 6745 0467Email: [email protected] Site: www.crowcon.com

Gasmaster Specifications

Crowcon reserves the right to change the design or specification of these products without notice

1Event log access requires optional Communications Kit and communications port

gas master

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